Researchers found evidence that the joints evolved as the species became active predators with jaws and mobile skeletons.

The different types of movement that are permitted at each joint are described below. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes ...

providing more mobility and stability compared to other joint types. A synovial joint allows bones or cartilage to slide past each other with the aid of a lubricated cavity between them.

The different types of movement that are permitted at each joint are described below. Flexion – bending a joint. This occurs when the angle of a joint decreases. For example, the elbow flexes ...